Durable Performance Compression Spring Auto Coil Spring

• Customization: Available
• Loading Weight: Customized
• Material: Aluminum Alloy
• Model NO.: Customized
• Number of Axles: Not Applicable
• Type: Coil Spring
• Installation Position: Front / Rear
• Product Type: Suspension Spring
• OEM Service: Available
• Certifications: ISO9001, ISO14001, AAR
• Warranty: 1 Year
• Feature: Heavy Load & High Compression Resistance
• Transport Package: Customized
• Specification: Material diameter 12mm, customizable
• Trademark: LUTONG
• Origin: Inner Mongolia, Baotou

Product Description

Cold Coiled Spring

LUTONG cold coiled spring is a heavy-duty suspension spring specially designed for vehicle bogies and heavy transport equipment. It is fabricated from premium alloy spring steel through the cold coiling forming process at room temperature. This suspension spring can be installed at the front or rear axle position. The standard wire diameter reaches 12mm, and customized dimensions are available upon request.
 
As a key elastic component of the suspension system, the cold coiled spring bears vehicle load, absorbs vibration and impact force generated during vehicle operation, provides stable preload, and evenly distributes dynamic loads. It effectively reduces the impact transferred to the bogie and vehicle body, protects the whole running gear, improves running stability and riding safety.
 
Manufactured in Baotou, Inner Mongolia, our cold coiled springs have passed ISO9001, ISO14001 and AAR certifications. OEM custom service is available to match different bogie and vehicle model requirements. We provide a 1-year product warranty, customized export packaging options, and the price can be negotiated based on order volume.

Applicable to various types of bogies, our leaf springs serve multiple vital functions. Their primary functions are to bear the weight of the vehicle body, cushion impacts and vibrations generated from the track during operation, provide stable preload for the bogie assembly, and distribute static and dynamic loads evenly across the whole suspension system. By doing so, they effectively protect the bogie and vehicle body from excessive stress, reduce wear of related components, and ensure safe and smooth running of the vehicle.

Detail

Made of high-grade alloy spring steel, the cold coiled spring has high tensile strength, excellent hardness and outstanding fatigue resistance. The cold coiling process guarantees precise dimension, smooth surface and stable elastic performance. It can continuously work under heavy load and frequent vibration without easy deformation or fracture, adapting to tough operating environments.

We support full OEM customization. Apart from the standard 12mm wire diameter specification, we can produce cold coiled suspension springs according to your drawings, samples or technical parameters. Products can be tailored for front or rear axle installation to fit various bogies, railway vehicles, heavy trucks and engineering machinery.

Our factory holds ISO9001 quality management certification, ISO14001 environmental management certification and AAR industry certification. Every spring goes through multiple tests including fatigue test, load test and dimension inspection before delivery, ensuring consistent and reliable quality for bulk export orders.

With accurate cold coiling technology, the spring maintains uniform stiffness. It efficiently absorbs shocks and vibrations, balances vehicle loads, lowers component abrasion, and extends the service life of bogie and related spare parts.

1-year warranty is provided for qualified products. Customized export packaging can be offered to prevent rust and mechanical damage during long sea transportation. As a direct manufacturer, we have stable production capacity, competitive and negotiable prices for large orders.

Product Line

Company Profile

Certifications

Packaging & Shipping

FAQ

1. What is cold coiled suspension spring used for?

The cold coiled suspension spring is an essential elastic part for bogies and heavy vehicles. It bears vehicle weight, absorbs shocks and vibration during operation, supplies stable preload and evenly distributes dynamic loads. It stabilizes vehicle running and protects bogie assemblies.

2.What material are your cold coiled springs made of?

Our LUTONG cold coiled springs are made of premium alloy spring steel. Adopting the cold coiling manufacturing process, the spring features high tensile strength, good toughness and superior anti-fatigue performance for heavy-load working conditions.

3.Can you do OEM customization?

Yes, OEM service is available. We can produce cold coiled springs according to your drawings, samples or technical requirements. The standard wire diameter is 12mm, and we can customize specifications for front or rear axle installation.

4.What certifications do you have?

Our products are certified with ISO9001, ISO14001 and AAR standards. All finished springs will undergo strict quality inspection before shipment.

5.What is your warranty term?

We offer a 1-year warranty for our qualified cold coiled springs. We will provide professional after-sales support if any quality issue occurs within the warranty period.

6.Can you customize export packaging?

Yes, customized packaging is supported. We design export packing to protect springs against rust and collision damage during long-distance sea shipping.

7.Where is your factory located?

Our factory is located in Baotou, Inner Mongolia, China, with stable production capacity to support bulk orders.